package com.itheima.reggie.controller;

import com.aliyun.oss.model.OSSObject;
import com.itheima.reggie.common.FileUtils;
import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.Resource;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URL;
import java.util.UUID;

/**
 * 文件上传和下载
 */
@RestController
@RequestMapping("/common")
@Slf4j
public class CommonController {

    @Value("${reggie.path}")
    private String basePath;

    /**
     * 文件上传
     * @param file
     * @return
     */
    @PostMapping ("/upload")
    public R<String> upload(MultipartFile file) throws IOException {
        //file是一个临时文件，需要转存到指定位置，否则本次请求完成后临时文件会删除
        log.info(file.toString());

        //原始文件名
        String originalFilename = file.getOriginalFilename();

//        Resource resource = file.getResource();
//        URL url = resource.getURL();
//
//        log.info(originalFilename);
//        log.info(String.valueOf(url));
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));

        //使用UUID重新生成文件名，防止文件名称重复造成文件覆盖
        String fileName = UUID.randomUUID().toString() + suffix;
        FileUtils.uploadFile("oss-cn-hangzhou.aliyuncs.com",
                "LTAI5tPRH741xEBi9mu7YwVU",
                "4PBj8SyoJbS39AP3H0MKozk1EbhRAP",
                "reggie-destiny",
                "reggie-destiny/"+fileName,
                "E:\\资料\\04-项目一瑞吉点餐\\项目课程\\资料\\图片资源\\"+originalFilename);

//        try {
//            //将临时文件转存到指定位置
//            file.transferTo(new File(basePath+fileName));
//        } catch (IOException e) {
//            e.printStackTrace();;
//        }
        return R.success(fileName);
    }

    /**
     * 文件下载
     * @param name
     * @param response
     */
    @GetMapping("/download")
    public void download(String name, HttpServletResponse response){
        try {
            OSSObject ossObject = FileUtils.downloadFile("oss-cn-hangzhou.aliyuncs.com",
                    "LTAI5tPRH741xEBi9mu7YwVU",
                    "4PBj8SyoJbS39AP3H0MKozk1EbhRAP",
                    "reggie-destiny",
                    "reggie-destiny/" + name,
                    basePath + name);
            //输入流，通过输入流读取文件内容
            InputStream inputStream = ossObject.getObjectContent();

//            FileInputStream fileInputStream = new FileInputStream(new File(basePath, name));
            //输出流，通过输出流将文件写回浏览器
            ServletOutputStream outputStream = response.getOutputStream();
            IOUtils.copy(inputStream,outputStream);
//            fileInputStream.close();
            inputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
//        try {
//            //输入流，通过输入流读取文件内容
//            FileInputStream fileInputStream = new FileInputStream(new File(basePath, name));
//            //输出流，通过输出流将文件写回浏览器
//            ServletOutputStream outputStream = response.getOutputStream();
//            IOUtils.copy(fileInputStream,outputStream);
//            fileInputStream.close();
//        } catch (IOException e) {
//            e.printStackTrace();
//        }
    }
}
